Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
HK M...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
TECO...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Toda...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Cons...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
How ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
How ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
How ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
0
20...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
How ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Diel...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
How ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
• Th...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
• Mo...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
The ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
The ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Note...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Note...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Note...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Intr...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Intr...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Intr...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Intr...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Intr...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Perf...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Set ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Set ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Set ...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Refe...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Refe...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Refe...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Refe...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Refe...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Refi...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Note...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Note...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Thin...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Thin...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Thin...
Solution Providers for Process Industries
Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121
Thin...
Upcoming SlideShare
Loading in …5
×

TECO HK Series Microwave Consistency Transmitter Technical Review

338 views

Published on

The TECO HK Series of microwave consistency transmitters provide a versatile, safe and easy-to-calibrate means for measuring the consistency of paper stock. The HK Series can successfully measure broke, recycle or other difficult fiber types, independent of fiber length, freeness or wood species.

Published in: Engineering
  • Be the first to comment

  • Be the first to like this

TECO HK Series Microwave Consistency Transmitter Technical Review

  1. 1. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 HK Microwave Consistency Transmitter Technical Review 2.0
  2. 2. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 TECO Products & Services •Stockrite™ consistency transmitters •Drainac™ freeness transmitter •Brainac™ refiner control systems •BrainDrain™ refiner/freeness control •Silica free heatless air dryers •Instrument and valve repair, remanufacture & calibration •Flow meter expertise and sales
  3. 3. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Today’s Presentation •How Microwave Measurement Works •The HK Series Microwave •Points on Installation •Calibrating the HK •Things to think about
  4. 4. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Consistency Measurement •No direct measurement of consistency –Must measure something else which has a relationship to consistency •Mechanical Transmitters –Respond to apparent viscosity or network strength •Optical Transmitters –Respond to absorption, reflection or transmission of light
  5. 5. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 How does Microwave work? •Measures the bulk dielectric constant “ε” of your process •This is a measure of how fast EM energy can travel through a material •Usually expressed as a ratio relative to speed of light in a vacuum
  6. 6. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 How does Microwave work? •Water has a high dielectric constant –About 80 •Cellulose Fiber (and most mineral fillers) have a low dielectric constant –About 4
  7. 7. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 How does Microwave work? •The bulk dielectric constant of your process is a function of how much water and not-water is in the process •A higher dielectric means there’s more water and a lower dielectric means less water
  8. 8. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 0 20 40 60 80 100 0 20 40 60 80 %Cs Dielectric Dielectric vs Consistency Pure Water Pure Fiber
  9. 9. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 How does Microwave work? •You measure the dielectric constant by measuring the phase shift of a signal transmitted through the process •As the dielectric changes, the phase shift of the signal will also change
  10. 10. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Dielectric vs Phase Shift 5 10 15 20 25 30 100 150 200 250 300 350 400 Dielectric Phase Shift More Water More Water
  11. 11. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 How does Microwave work? •To get consistency, you build a calibration between the measured phase shift, Φ, and your lab’s consistency evaluations
  12. 12. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 • The Compact System • Single piece construction with flange-mounted insertion-pin sensors The HK System
  13. 13. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 • Modular System • Remote Electronics • Available in insertion or non- insertion configurations The HK System
  14. 14. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 The HK System Insertion Pins Available in different lengths
  15. 15. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 The HK System Non-Insertion Pins Non-Invasive Transmitter Bodies
  16. 16. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Notes on Installation •Choose a vertical pipe as close to a pump discharge as possible –maximizes turbulent mix in the pipe and avoids laminar flow –Avoid horizontal runs •Ensure minimum pressure of 15 psi –Higher line pressures are desirable –Reduces the impact of entrained air
  17. 17. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Notes on Installation •Choose locations with stable process temperature •Avoid locations subject to large variations in conductivity/salinity •Insertion pins should be angled –Promotes shedding of trash and avoids stock buildups
  18. 18. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Notes on Installation •Minimize distance from the transmitter to the sensors •Protect Cables and Connectors –Don’t over tighten connectors –Avoid water or dirt contamination of coax connectors –Don’t bend cables
  19. 19. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Intro to Calibration The Basic Calibration Equation is Cs = A1*Φc + A0 Cs = calculated consistency value A1 and A0 are linear coefficients Φc = temperature-corrected phase shift
  20. 20. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Intro to Calibration Temperature corrected phase shift Φc is calculated: Φc = + Φraw + Tk1*(T-Tref) Tk1 = linear temperature coefficient T = measured process temperature Tref = reference process temperature Φraw = measured uncorrected phase shift Note that this is a delta or deviation calculation
  21. 21. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Intro to Calibration Finally, Φraw is itself a delta: Φraw = Φm - Φref Φm = measured phase shift Φref = reference phase shift
  22. 22. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Intro to Calibration •Put it all together and the whole thing looks like: Cs = A1* {Tk1*(T-Tref)+(Φm–Φref)} + A0 •The meter measures red parameters •We define green parameters during setup and calibration
  23. 23. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Intro to Calibration A1 is the slope of the line A0 is the y-intercept of the line %Cs Φ Phase Shift Temperature correction adjusts Φ
  24. 24. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Performing a Calibration •Successful calibrations consist of several steps –Setup Operating Parameters –Perform the Reference Measurement –Refine Calibration Offset
  25. 25. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Set Initial Operating Parameters 1) Define the linear coefficients A1 and A0 –The initial value of A1 depends on sensor configuration, e.g. -0.235 –The initial value of A0 is 0.0 –There is a table in the manual that defines the coefficients for various sensor configurations
  26. 26. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Set Initial Operating Parameters 2) Define the linear temperature correction coefficient Tk1 –Again, the initial value of Tk1 depends on the sensor configuration. e.g. 1.0
  27. 27. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Set Initial Operating Parameters 3) Define the output 4-20 mA range –i.e., what %Cs produces 4mA and 20mA 4) Optional –Some exteriorly-mounted meters may require that you define ambient temperature correction coefficients because of temperature-induced cable effects from seasonal temperature shifts. This procedure is rare.
  28. 28. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Reference Measurement •Establishes normal operating regime (Tref & Φref) for the meter – All subsequent measurements are based on deviations away from the normal regime •Must be completed properly for a successful application – Ensure that total system attenuation falls within the acceptable limits of 5 – 55dB
  29. 29. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Reference Measurement •Process must be stable – Signal attenuation variance less than 0.5dB – Phase Shift variance less than 20 degrees Phi •Process sample must be collected and analyzed during performance – Use proper collection procedures & analysis methodology for the best results •Perform the Reference Measurement Procedure twice for best results
  30. 30. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Reference Measurement •Establishes reference parameters Tref and Φref •Eetermines nominal signal attenuation for the application •Useful for diagnosing system behavior if the unit develops problems in the future •Attenuation changes indicate shifts in the process or in instrument function.
  31. 31. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Reference Measurement •Finally, input the Lab Evaluation of the process sample collected earlier. •This will adjust the value of A0
  32. 32. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Reference Measurement •Complete Reference Measurement by initiating Measurement Range Computation –software procedure that sets the meter’s limits for consistency. –These limits are not accessible through the operator interface –can be calculated manually –process consistencies outside limits will not read correctly
  33. 33. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Refine the Calibration Offset •Collect several process samples •Analyze the samples and determine the average meter deviation from the lab values •Adjust A0 accordingly A0 new = A0 old + 1/n Σ (Lab-Meter) •The Meter is now calibrated and measuring consistency
  34. 34. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Notes on Calibration •This methodology produces a single point calibration •Occasionally, better performance is possible by tweaking A1 and A0 •Use Excel to regress a number of process sample-meter data pairs – Use the resulting linear coefficients to adjust the meter’s operational parameters using the technique illustrated in the manual
  35. 35. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Notes on Calibration •The HK meter supports a linear calibration model only •To implement non-linear models, you will need to use your DCS – Set to output uncorrected phase shift only – Set A1= 1.0 and both Tk1 & A0= 0.0
  36. 36. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Things to Think About •Application success requires consideration of these factors: – Temperature – Conductivity – Salt Content – Entrained Air – Fillers and Additives
  37. 37. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Things to Think About •Temperature – The dielectric constant of water is a function of temperature, which is why we compensate for it •Conductivity – Changes in conductivity will change the bulk dielectric constant of the process. These shifts will look like changes in consistency, but they’re not. Severe variations may require compensation for best accuracy
  38. 38. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Things to Think About •Salt Content – Like conductivity, salt content will change the bulk dielectric of the process. Shifts in salt will also look like shifts in consistency •Entrained Air – Air has a dielectric of about 1.0 and will look like fiber to a microwave signal – Higher line pressures make big bubbles into little bubbles and minimizes the impact of entrained air
  39. 39. Solution Providers for Process Industries Thompson Equipment Company, Inc. 125 Industrial Ave., New Orleans, LA 70121 Things to Think About •Fillers and Additives – Most fillers and additives have high dielectrics and look like water. Some, like TiO2, have low dielectrics and will look like fiber

×